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AT29C257-70JC中文资料PDF规格书
AT29C257-70JC规格书详情
Description
The AT29C257 is a 5-volt-only in-system Flash programmable and erasable read only memory (PEROM). Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 70 ns with power dissipation of just 275 mW. When the device is deselected, the CMOS standby current is less than 300 µA. The device endurance is such that any sector can typically be written to in excess of 10,000 times.
To allow for simple in-system reprogrammability, the AT29C257 does not require high input voltages for programming. Five-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from a static RAM. Reprogramming the AT29C257 is performed on a page basis; 64-bytes of data are loaded into the device and then simultaneously programmed. The contents of the entire device may be erased by using a 6-byte software code (although erasure before programming is not needed).
During a reprogram cycle, the address locations and 64-bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a program cycle, the device will automatically erase the page and then program the latched data using an internal control timer. The end of a program cycle can be detected by DATA polling of I/O7. Once the end of a program cycle has been detected a new access for a read, program or chip erase can begin.
Features
• Fast Read Access Time - 70 ns
• 5-Volt-Only Reprogramming
• Page Program Operation
Single Cycle Reprogram (Erase and Program)
Internal Address and Data Latches for 64-Bytes
• Internal Program Control and Timer
• Hardware and Software Data Protection
• Fast Program Cycle Times
Page (64-Byte) Program Time - 10 ms
Chip Erase Time - 10 ms
• DATA Polling for End of Program Detection
• Low Power Dissipation
50 mA Active Current
300 µA CMOS Standby Current
• Typical Endurance > 10,000 Cycles
• Single 5V ± 10 Supply
• CMOS and TTL Compatible Inputs and Outputs
• Pin-Compatible with AT29C010A and AT29C512 for Easy System Upgrades
产品属性
- 产品编号:
AT29C257-70JC
- 制造商:
Microchip Technology
- 类别:
集成电路(IC) > 存储器
- 包装:
管件
- 存储器类型:
非易失
- 存储器格式:
闪存
- 技术:
闪存
- 存储容量:
256Kb(32K x 8)
- 存储器接口:
并联
- 写周期时间 - 字,页:
10ms
- 电压 - 供电:
4.5V ~ 5.5V
- 工作温度:
0°C ~ 70°C(TC)
- 安装类型:
表面贴装型
- 封装/外壳:
32-LCC(J 形引线)
- 供应商器件封装:
32-PLCC(13.97x11.43)
- 描述:
IC FLASH 256KBIT PARALLEL 32PLCC
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ATMEL |
22+ |
PLCC |
700 |
原装现货,假一罚十 |
询价 | ||
ATMEL |
21+ |
PLCC |
700 |
原装现货假一赔十 |
询价 | ||
MicrochipTechnology |
19+ |
32-PLCC |
26580 |
存储IC一手货源,极具优势! |
询价 | ||
Microchip Technology |
23+ |
32-PLCC |
7300 |
专注配单,只做原装进口现货 |
询价 | ||
Microchip |
23+ |
20000 |
全新、原装、现货 |
询价 | |||
Microchip |
22+ |
32PLCC |
9000 |
原厂渠道,现货配单 |
询价 | ||
Atmel/Atmel Corporation/爱特梅 |
21+ |
PLCC |
6000 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 | ||
ATMEL |
22+ |
PLCC |
8200 |
全新原装现货!自家库存! |
询价 | ||
Atmel |
2022 |
ICFLASH256KBIT70NS32PLCC |
5058 |
原厂原装正品,价格超越代理 |
询价 | ||
ATMEL |
23+24 |
PLCC- |
9680 |
原盒原标.进口原装.支持实单 .价格优势 |
询价 |